Tbh matey if your putting a lascannon in your squad then you don't want your plasma gun firing at the same target so it's a waste of points
IMHO. I would have one vet squad with lascannon and a flamer for overwatch and have 2 plasma on the other one, or 3 if you can afford it

at this points level your opponents will really struggle with av14 which is nice but I think if your having plasma vets then maybe you need a different type of Russ? Maybe the vanquisher for anti tank or the one with the awesome twin liked auto cannon thing? For light anti tank? That way you could drop the lascannons from the vets and have one squad with plasma for anti
meq and the other for anti horde, something like Flamers with a heavy bolter/auto cannon, that way they rule at overwatch and when enemy closes can leap forward and burn for fun. Just a few ideas but I like that fact you've got a Russ at this points level, should fare you well